Week 5 Fantasy Football Rankings: Updated Top 25 Quarterbacks

With arguably his best supporting cast ever, Denver Broncos quarterback Peyton Manning is having the best (start of a) year of his career.

In fact, it's as good as any start to a season. Ever.

Through four games, Manning has thrown for 1,470 yards, which averages to 367.5 yards per game, 16 touchdowns and no interceptions. Although logic would lead us to believe he will slow from his pace of 5,880 passing yards, 64 touchdowns and no interceptions, it's hard to ignore how easy it seems for Manning & Co.

His efficiency statistics are just as amazing. Manning has completed 75.0 percent of his pass attempts, averaged 9.4 yards per pass attempt and compiled a passer rating of 138.0.

Not only has Manning led the Broncos to a 15-game regular-season winning streak, but they have beat all of their opponents during that stretch by at least a touchdown. With an average of 44.8 points scored per game, the Broncos are on pace to score 716 this season.

Even though you don't need any extra reasons to start Manning, Tony Dungy made an interesting point during the Sunday Night Football telecast last week.

Paraphrasing Dungy's quote from the broadcast, he said that his former quarterback knows the Cowboys defense better than Monte Kiffin since Manning practiced against the Tampa 2 utilized by Dungy (and Kiffin) for many years in Indianapolis.

Through four games, Chargers quarterback Philip Rivers has no games with 200 to 399 passing yards. He has either thrown for 400-plus yards (twice) or less than 200 yards (twice).

In last week's win over the Cowboys, Rivers set the record for highest completion percentage (83.3 percent) in a 400-yard passing game.

On the season, he now has a completion percentage of 73.9 percent and a passer rating of 118.8, both of which would shatter his previous career highs of 66.0 percent and 105.5, respectively.

Despite the loss of Danario Alexander and Malcom Floyd to injured reserve, Rivers is on pace to throw for 4,796 yards, 44 touchdowns and only eight interceptions.

Not only has he cut down in interceptions (Rivers threw 35 of them over the past two years), he has only been sacked six times in four games. Last year, he was sacked 49 times, which was second-most behind Green Bay's Aaron Rodgers.

Only Manning and Drew Brees have more fantasy points than Rivers through four games and he has a favorable matchup in Week 5 against the Raiders, who have allowed the ninth-most fantasy points to opposing QBs this season.

Tom Brady could become first 300-yard passer allowed by Bengals in 20 weeks

Patriots quarterback Tom Brady ended a five-game drought of regular-season games without 300 passing yards by throwing for 316 yards and two touchdowns against the Falcons last week.

This week, Brady and the Patriots face the Bengals, who have limited opposing passers to less than 300 yards for 19 consecutive games. The last quarterback that threw for 300-plus yards against them was Cleveland's Brandon Weeden (Sept. 16, 2012).

It will be another week that the team is without stud tight end Rob Gronkowski, who is officially out this week.

Based on a tweet this morning from Boston Herald's Jeff Howe, the Patriots are "highly optimistic" that slot receiver Danny Amendola (groin) will return. He has at least made the flight with the team to Cincinnati.